inference - a conclusion drawn from data and observations, procedure - a set of step-by-step instructions, evidence - observations and facts gained from experiments, tool - an object or device used to perform a task, investigation - a careful way of looking for something, hypothesis - a possible explanation about an observation that can be tested by scientific investigations, scientific method - organized ways to answer questions and solve problems, scientific law - describes a pattern or event in nature that is always true, scientific theory - an explanation of observations or events based on knowledge gained from many observations and investigations, independent variable - factor that is changed by the investigator, dependent variable - the factor a scientist observes or measures in an experiment, peer review - other scientists check your work,

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